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3 years ago

I don’t get this- it’s due tmrw

Chemistry

1 answer:

Simora [160]3 years ago

7 0

Insulate the cup, use a lid

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The time that is taken by neptune once around the sun is called

Elden [556K]

The time take by Neptune to travel once around the Sun is called the orbital period. It takes Neptune about 165 Earth years to make one complete orbit around the Sun.

7 0

3 years ago

Which of these bonds should be classified as ionic?

jolli1 [7]

Answer:

Na-O

Be-S

Explanation:

ionic bonds= metal and non metal

7 0

3 years ago

Read 2 more answers

How much energy in joules is released when 18.5 grams of copper cools from 285 °C<br> down to 45 °C

nadya68 [22]

Answer: 1709.4 Joules

Explanation:

The quantity of Heat Energy (Q) released on cooling a heated substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since Q = ?

M = 18.5 grams

Recall that the specific heat capacity of copper C = 0.385 J/g.C

Φ = 285°C - 45°C = 240°C

Then, Q = MCΦ

Q = 18.5grams x 0.385 J/g.C x 240°C

Q = 1709.4 Joules

Thus, 1709.4 Joules is released when copper is cooled.

5 0

3 years ago

Ice

fomenos

I think I it’s gonna be C.

8 0

3 years ago

Sulfur reacts with oxygen and creates two compounds. Compound A contains 1.34 g of sulfur for every 0.86 g of oxygen. Compound B

spayn [35]

Answer:

The mass ratio of oxygen rounded to the nearest whole no. 3 : 2

Explanation:

According to Law of Multiple proportion when two elements combine to make two or more different compounds, the mass ratio of the two element in the first compound, when divided by the mass ratio of the second compound , form a simple whole number ratio.

Compound A contains 1.34 g of sulfur for every 0.86 g of oxygen

$\frac{1.34}{0.86}= 1.5$

Compound B contains 11.63 g of sulfur for every 10.49 g of oxygen

$\frac{11.643}{10.49}= 1.0$

Ratio of oxygen in each compound

always put the larger number over the smaller number.

$\frac{CompoundA}{Compound B}=\frac{1.5}{1.0}=\frac{3}{2}$

3 0

3 years ago